Trace Elements in West Virginia Coals

Stratigraphic Distribution of Neodymium (Nd)

The stratigraphic distribution of Neodymium (Nd) shows most coals average
less than 10 ppm with a slight stratigraphic trend toward increased Nd
upward in Middle Pennsylvanian coals, possibly reflecting the ubiquitous
occurrence of monazite and other ash related
minerals in West Virginia coals.